Miller. — The Diptera Fauna of New Zealand. 183 



elongate triangle ; occiput rounded, violet-black, and hairy especially below 

 where they are silvery ; front blue-black with delicate brown hairs, narrow 

 especially toward the antennae, above which it suddenly widens to form a 

 triangular area of silvery ash-grey pubescence, along which is a narrow 

 and darker medio-longitudinal stripe. 



Antennae about half the width of head or a little more, and situated at 

 the middle line ; 1st and 2nd joints bristly, the latter about three-quarters 

 the length of the former, both yellow, but the 1st, owing to the denser 

 bristles, darker than the 2nd ; 3rd joint composed of 8 segments, denselv 

 pubescent and with 2 terminal hairs, the penultimate segment also having 

 some longer hairs apically ; all the 1st and undersides of 2nd and 3rd 

 segments yellow, the remainder fuscous. The dorsal edge of this joint is 

 straight, the ventral approaching the dorsal toward the apex. 



Face strongly widening below, hairy, the hairs longer and denser below, 

 shiny blue-black with a greyish pubescence at epistome ; facial orbits densely 

 greyish -pubescent ; oral margin violet-black and densely hairy, slightly pro- 

 duced downwards posteriorly ; proboscis and palpi pale yellow, the latter 

 small and indistinct. 



Dorsum of thorax and scutellum brilliant bluish-green, with a vestiture 

 of minute and delicate hairs, each hair arising from a minute depression, 

 giving, on the whole, a delicate punctured appearance. The scutellum is, 

 if anything, bluer than the dorsum, the 4 strong spines being yellow but 

 darker at the base. Humeral and post-alar calli dark tawny, the former 

 with distinct yellow hairs. In certain lights the dorsum may be bronzv- 

 green, violet-blue, or golden. Pleurae with silvery hairs, coloured as the 

 dorsum but the reflections more pronounced. 



Anterior and middle femora and tibiae pale yellow ; posterior femora 

 thickened, darker than the others and fuscous at the apex ; posterior tibiae 

 thickened but not strongly so, darker than the others, slightly fuscous at 

 the knees but strongly fuscous on apical quarter. Anterior tarsi fuscous, 

 the middle pale yellow but darker apically, the posterior thickened, darker 

 than the middle and slightly fuscous toward the apex. All the protarsi 

 longer than the following joint. 



Wings yellowish, the veins yellow, the marginal cell clouded with vellow ; 

 costal cell strongly widened ; auxiliary vein sinuated at apex ; 1st sub- 

 marginal cell proximally obtuse ; the 3rd vein apparently arising from 

 anterior cross-vein; 1st section of 3rd vein about half the length of 

 the anterior cross-vein, which is perpendicular ; 3rd vein slightly sinuated, 

 the anterior branch fully twice as long as anterior cross-vein, arising 

 almost at right angles and bisinuated to the costa (fig. 9) ; 3rd posterior 

 vein not reaching half-way to margin of wing ; vein between the discal 

 and 5th posterior cells a little longer than anterior cross-vein ; distance 

 from the margin of the confluence of the 5th and 6th veins nearly three 

 times the length of anterior cross-vein. Anal angle strongly curved. 



Halteres pale yellow. 



Abdomen with 7 segments, of equal width throughout, almost as wide 

 as thorax, with a vestiture of dense pale-yellow hairs along the sides and 

 short hairs on dorsal surface ; 1st segment blackish-brown but for a central 

 tawny part extending on to the posterior margin and not separated from 

 the colour of following segment ; 2nd to 4th segments tawny, each with a 

 narrow posterior blackish-brown band widening laterally to form a triangular 

 spot on the sides at the posterior corners. Although along the middle this 

 band is separated from the posterior margin by a narrow and tawny fusi- 

 form area, it extends on to the margin at the sides ; 5th and 6th segments 



